Metal-bending device



Sept; 28 1926. 1,601,405

H. J. MICHAELSEN METAL BENDING DEVICE 2 Sheets-Sheet 1 Filed July '71925 se i. 2s,192s.- 1,601,405

- H. J. MICHAELS EN METAL BENDING DEVICE Filed July 7. 1925 2Sheets-Sheet 2 Henr J- Michalsen Patented Sept. 28, 1926.

UNITED stares H me J. ma nesia,- ol' TACOMA; wnsnrno'ron.

MnTAnBnnnIn'G' DEVICE.

Application filed July 7,

The present invention relates to; metal bending devices and moreparticularly to a hand implement for I use about small machine shops andthe like.

An object of. his invention isto provide a device for rolling on bendingthe end of a spring to form an eye such as is used in automobile springconstruction so that a mechanic can easily and quickly make a repair toan automobile spring and substitute leaves therefor from stock material;

Another object is to provide a .,machine which may be adjusted toaccommodate stock bars of different thicknesses and which may also beadjusted to form eyes on the ends of the bars of different diameters orof the. same diameter with stock of different thicknesses. V

A further object of the invention is to provide arecipro'catinghandlewith a gripping portion ca'pable'of being moved toward and from the workaccording to the thickness thereofand which when adjusted may then beswung on the arc of a circle to bend the material, and may be retractedto obtain a new grip on the material forfurtherbend ing until the eyeformation is complete.

A still further object of the invention is to provide a portable handoperated and adjustable device of this character whichmay beeconomically manufactu'redp which is light in weight, and which may beeasilyset up for use Without special support or special attachments. v p

The above and various other objects and advantages of this inventionwill in part be described in, and in part be understood from, thefollowing detailed description of the present preferred embodiment, thesame be-; ing illustrated in the accompanying drawings, whereinz I VFig. 1 is a vertical longitudinal section taken through a bendingdevice-constructed according to the present invention, a bar of stockmaterial being shown in initial position therein. y

Fig. 2 is a top plan view of the same, partly in section.

Fig. 3 is a transverse line 3-3 of Fig; 1; p I

Fig. 1 is a similar view taken'on the line HofFigl.

Fig. 5 is areduced longitudinal section taken through the deviceshowin'gin full lines the position of the movable parts upon completionof a stroke thereof and showing section taken on the 1925. Serial No.42,083.

in dotted lines the, initial position of the outer-end of the frame .10may beofdeeper construction than the inner end thereof for the purposeof facilitating the. introduction and removal of. the. work, shown inthe present instance as a flat bar 11 of stock material adapted to bebent or curved at one end into an eye construction; a ..P1voted to swingin the forward end of the frame 10 is a reciprocating member coin-vprising a pair of side plates-12 which are of relatively wideconstructionat their lower ends, and which may .be of reduced widthatthelr upper ends. The wide ends of the plates 12 are apertured .toreceive there through bushings 13 which are mounted in the sides of theframe 101 and provide pivot supports for the arms 12. The outer ends ofthe arms 12 are connected together by a cross bar 14 which is providedwith a trans verse opening therethrough for the purpose to be presentlydescribed.

, A hand lever 15 is fitted at its lower end between the intermediateportions of the plates 12 a'ndis provided at its rear side and lower endwith'an offset pivot eye 16 through'which is fitted a rod 17 carried bythe plates 12 to pivotally, support the handle 15. Extending forwardlyfrom the pivot 16 and from the inner end of the hand lever 15 is anarcu'ate claw 18 .with afratchet toothed lower surface with the teethfacing outwardly adapted to engage-the upper surface of the stock 11 forbinding against it when the handle 15 is swung forwardly.

A core pin 19 is removably fitted across the frame 10 in the bushings 13and is given suitable dimensions at opposite ends to closely fit thebushings'13. The intermediate portion of the pin 19 is so proportioned,as to diameter as to engage and bear" againstthe under side of the stock11 and support it against pressure of the claw 18. The core pin 19 isremovable and provided upon one end with a finger hold or ring 20 bymeans of which the pin may be withdrawn and inserted. To determine thepositioning of the pin the end adjacent the finger hold 20 may have anenlarged head 21, and the adjacent bushing 13 may be of correspondingsize to receive it, while the inner end 22 of the pin may be of smallerdiameter and the adjacent bushing 13 correspondingly reduced.

The core pins 19 may be of different sizes as to their central portionsso as to accommodate stock 11 of different thicknesses and to form eyesof different diameters, and in Fig. 7 .is shown one modification ofcorepin 23 which has a reduced intermediate portion as compared with the pin19.

The handle 15 is provided with an opening 24 therethrough adapted toregister with the opening 25 in the cross bar 14, and a bolt 26 isloosely fitted through the openings 24 and 25 and provided thereon witha coil spring 27 lying between the hand lever 15 and the cross bar 14 tonormally urge the same apart. A winged nut 28 is threaded upon the rearend of the bolt 26 and bears against the rear side of the cross bar 14to draw the bolt backwardly through the hand lever 15 and the cross bar14 and bind the head of the bolt 26 against the forward side of the handlever 15. As shown in dotted lines in Fig. 1 the winged nut 28 may beadjusted lengthwise of the bolt 26 to vary the distance between the handlever 15 and the bar 14. This distance is adjusted to bring the claw 18against the work when the reciprocating member is swung backwardly toits initial position and to take up the play between the hand lever 15and the reciprocating member when the hand lever is drawn forwardly anddownwardly to bend the stock 11 about the core pin 19.

In order to hold the rear portion of the stock 11 from rising during thebending operation, the frame 10 may be provided with a pair ofupstanding ears 29 for receiving a cross pin 30 which is selectivelypositioned in registering openings 31 formed in the ears.

In operation the selected core pin 19 is inserted in the frameconcentrically to the re ciprocating member. The bar 11 is fitted underthe pin 30 and upon the upper side of the core pin 19. The winged nut 28is adjusted along the bolt 26 to swing the hand lever 15 and bring theclaw 18 into proper contact with the upper surface of the stock 11. Thehand lever 15 is now swung forwardly into the full line position shownin Fig. 5, such as to bind the stock upon the core pin and draw thestock forwardly and bend it downwardly against the outer surface of thepin. The reciprocating member is now returned to initial position asshown in dotted lines in Fig. 5, and the operation repeated with theclaw 18 engaging the succeeding portion of the stock 11. The reciprocating member and the hand lever 15 is thus worked back and forthuntil the complete eye is formed, or the curvature carried out to thedesired extent.

The claw member 18 together with the hand lever 15 provides a grippingmember which is caried by the reciprocating member and which isinitially operated prior to the advance of the reciprocating member, andwhich is released by the sliding of the bolt 24 through the lever 15 andbar 14 when the spring 27 is compressed during the initial backwardmovement to retract the reciprocating member. The openings 31 in theears 29 may be carried through the sides of the frame 10 as shown inFig. 3 so that the bar 30 may be inserted through the ears from eitherside of the device.

It is of course understood that various changes and modifications may bemade in the details of construction and design of the above specificallydescribed embodiment of this invention without, departing from thespirit thereof, and being restricted only by the scope of the followingclaims.

What is claimed is:

1. A spring eye bender comprising a frame,

a pin mounted in the frame, a pivotal memher on the pin, a lever mountedon the pivotal member and adapted to turn therewith, a claw secured tosaid lever and at the forward end thereof, adjusting means for saidclaw, and a spring interposed between said lever and said adjustingmeans for insuring the initial gripping of the claw.

2. A spring eye bender comprising a frame, a pin in the frame, areciprocating member mounted on the pin and adapted to swingtherearound, a claw pivotally mounted on said reciprocating member,adjusting means for said claw, yieldable means adapted to insure theintial gripping of said claw prior to the forward movement thereof, anda lever secured to said claw for swinging the. claw and thereciprocating member about the pin. Y

3. An automobile spring eye bender, comprising a frame, a removable corepin mounted in the frame for supporting the end of a stock bar, areciprocating member pivotally mounted on the frame, concentric to thecore pin, a hand lever pivoted on the reciprocating member, a clawprojecting forwardly from the pivoted end of said lever and adapted tobind against the upper side of said bar, a bolt adjustablyconnectingithe lever with the reciprocating member, and a springinterposed between the lever and the reciprocating member for insuringthe initial gripping of the work against the core pin prior to themovement of the reciprocating member by said handle.

4. A metal eye bender comprising a frame,

a work support pin in the frame, a reciprocating member mounted on thepin, a claw pivoted to said reciprocating member, a bolt connecting theupper end of said claw and said reciprocating member for adjusting theclaw with respect to said pin, and a spring mounted on said bolt andbetween the claw and the reciprocating member for insuring the initialgripping of the claw.

5. A metal eye bender comprising a frame, a core pin removably mountedin the frame,

a reciprocating member adapted to swing about said core pin, a clawpivoted to said reciprocating member, adjustable means for said claw,and a spring mounted on said adjustable means and between the claw andreciprocating member for insuring the gripping of the claw upon the workprior to the swinging of the reciprocating member about the core pin.

HENRY J. MIGHAELSEN.

